let me ask you a question, does warm air rise? you guys know about that from before? did you guys know that you get in the top of a ladder, you're painting the ceilings a lot harder up there than down below? warm air does rise, okay? why does warm air rise? evaporation. oh, there's probably no reason for that. it's just one of those things that happen, right? no, no, no, no. warm air does rise--and when warm air rises, when a volume of warm air rises, is there more pressure, more air pressure up there or less? less. when you're swimming in the water and you're way, way, way down deep, more water pressure or less? more. begins with a m. more, right? and as you come up, doesn't the pressure get less and less? right. well, guess who lives in an ocean of air, begin with u, end with us-- i mean, s. us, we live a ocean of air. and up there's not so much pressure. so let me ask you guys a question, what do you suppose would happen to the size of a balloon if you let it go and it floated higher and higher? would the balloon get bigger or get squashed up smaller and smaller? think about that and check your neighbor right now.